ZyXEL Communications PLA-470 V2 - V3.0.5 Instalační příručka stáhnout pdf (Strana 269)

The PLC technologies operate at the data link layer level (MAC layer); they can-

not be used for the direct remote SNMP interrogation. However, a number of hard-

ware and software tools are used for supervising all the PLC networks.

Figure 11.3 illustrates the supervision of several PLC networks from various

technologies. AsokaUSA, DS2, and Spidcom directly implement a HTTP interface

and an SNMP stack (with the corresponding MIB) in their devices.

Since the HomePlug (1.0, Turbo, and AV) technologies do not propose an

SNMP stack in their devices, it is necessary to use or to develop supervision tools at

the MAC level and to use the PLC configuration tools that give the status of the PLC

links at the PHY level.

Choosing a Standard

Unlike PLC networks for domestic use, for which the price of the devices is the main

criterion, the professional and industrial corporate networks often require

functionalities that imply the choice of a more professional technology while

endeavoring to select a standard that is as open as possible to allow future evolu-

tions.

Table 11.1 lists the criteria for the selection of a corporate PLC technology.

250 PLC for Businesses

Figure 11.3 Supervision tools for the various PLC network technologies

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ZyXEL Communications PLA-470 V2 - V3.0.5 Instalační příručka Strana 269